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Finding the Fourth Proportional to 74,989.71, 103,418.73 and 62,222.58

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Solution

The fourth proportional to 74,989.71, 103,418.73 and 62,222.58 is: 85,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,989.71 : 103,418.73 = 62,222.58 : x
  2. Step 2: Convert to fraction form
    74,989.71/103,418.73 = 62,222.58/x
  3. Step 3: Cross multiply
    74,989.71x = 103,418.73 × 62,222.58
  4. Step 4: Simplify right side
    74,989.71x = 6,434,980,200.92
  5. Step 5: Solve for x
    x = 6,434,980,200.92/74,989.71
  6. Step 6: Final answer
    x = 85,811.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.